In 420 BC, the Roman Empire perished, Europe fell into an unprecedented dark period, the evil barbarian army ravaged the territory of England, and a cursed baby was born! It is predicted that he is the son of evil spirits, which will bring endless suffering to mankind, but the wizards decided to raise him themselves despite the prediction. He is the legendary magician: Merlin! As a teenager, Merlin gradually revealed his magical talent, so that Vandiger, who was also adopted by the wizard, never got attention. Therefore, he secretly manipulated barbarian troops and evil magic dragon to invade England with the intention of destroying Merlin and ruling England! In order to resist the invasion, Merlin must find out the legend that the king summoned the army in time and discover the powerful power hidden in himself, so as to repel magic dragon's army and save more lives.